El-Oued is known for some diseases caused by fluoride concentration in drinkable water. To reduce it, we have chosen a sample with the highest content of fluoride among many sources in order to coagulate it with Al2(SO4)3·18H2O, Fe2(SO4)3·H2O and FeSO4. In order to get better reduction yield of fluoride, a study has been done on the influencing parameters (concentration, pH, temperature) to choose the best conditions. The remove of fluoride is favorable at low concentration of Al2(SO4)3, at room temperature and normal acidity.
International Letters of Chemistry, Physics and Astronomy (Volume 13)
D. Atia et al., "Comparative Study for the Defluoridation of Water by Coagulation", International Letters of Chemistry, Physics and Astronomy, Vol. 13, pp. 123-131, 2013